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Exclusive: If you’re counting the days until the next X-Men movie Days Of Future Past hits cinemas, then this clip should whet your appetite for the big event.

The minute-long snippet from the forthcoming blockbuster sees Peter Dinklage’s character, military scientist Bolivar Trask showing a boardroom full of executives and members of the military how to use his Mutant Finder device.

However he gets more than he bargained for when one of their number turns out to be Mystique (Jennifer Lawrence) – who despite being heavily disguised as an army general swiftly reveals her true colours.

Michael Fassbender, Ian McKellen, and Hugh Jackman also star, reprising their roles as the younger Magneto, the older Magneto and Wolverine – while Patrick Stewart is also returning to the X-Men fold as Professor Charles Xavier.